1#ifndef _ASM_IO_H 2#define _ASM_IO_H 3 4#include <linux/types.h> 5#include <asm/pgtable.h> 6 7#define virt_to_phys(a) ((unsigned long)__pa(a)) 8#define phys_to_virt(a) __va(a) 9#define virt_to_bus virt_to_phys 10#define bus_to_virt phys_to_virt 11 12static inline unsigned long isa_bus_to_virt(unsigned long addr) { 13 BUG(); 14 return 0; 15} 16 17static inline unsigned long isa_virt_to_bus(void *addr) { 18 BUG(); 19 return 0; 20} 21 22/* 23 * Memory mapped I/O 24 * 25 * readX()/writeX() do byteswapping and take an ioremapped address 26 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. 27 * gsc_*() don't byteswap and operate on physical addresses; 28 * eg dev->hpa or 0xfee00000. 29 */ 30 31static inline unsigned char gsc_readb(unsigned long addr) 32{ 33 long flags; 34 unsigned char ret; 35 36 __asm__ __volatile__( 37 " rsm 2,%0\n" 38 " ldbx 0(%2),%1\n" 39 " mtsm %0\n" 40 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 41 42 return ret; 43} 44 45static inline unsigned short gsc_readw(unsigned long addr) 46{ 47 long flags; 48 unsigned short ret; 49 50 __asm__ __volatile__( 51 " rsm 2,%0\n" 52 " ldhx 0(%2),%1\n" 53 " mtsm %0\n" 54 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 55 56 return ret; 57} 58 59static inline unsigned int gsc_readl(unsigned long addr) 60{ 61 u32 ret; 62 63 __asm__ __volatile__( 64 " ldwax 0(%1),%0\n" 65 : "=r" (ret) : "r" (addr) ); 66 67 return ret; 68} 69 70static inline unsigned long long gsc_readq(unsigned long addr) 71{ 72 unsigned long long ret; 73 74#ifdef CONFIG_64BIT 75 __asm__ __volatile__( 76 " ldda 0(%1),%0\n" 77 : "=r" (ret) : "r" (addr) ); 78#else 79 /* two reads may have side effects.. */ 80 ret = ((u64) gsc_readl(addr)) << 32; 81 ret |= gsc_readl(addr+4); 82#endif 83 return ret; 84} 85 86static inline void gsc_writeb(unsigned char val, unsigned long addr) 87{ 88 long flags; 89 __asm__ __volatile__( 90 " rsm 2,%0\n" 91 " stbs %1,0(%2)\n" 92 " mtsm %0\n" 93 : "=&r" (flags) : "r" (val), "r" (addr) ); 94} 95 96static inline void gsc_writew(unsigned short val, unsigned long addr) 97{ 98 long flags; 99 __asm__ __volatile__( 100 " rsm 2,%0\n" 101 " sths %1,0(%2)\n" 102 " mtsm %0\n" 103 : "=&r" (flags) : "r" (val), "r" (addr) ); 104} 105 106static inline void gsc_writel(unsigned int val, unsigned long addr) 107{ 108 __asm__ __volatile__( 109 " stwas %0,0(%1)\n" 110 : : "r" (val), "r" (addr) ); 111} 112 113static inline void gsc_writeq(unsigned long long val, unsigned long addr) 114{ 115#ifdef CONFIG_64BIT 116 __asm__ __volatile__( 117 " stda %0,0(%1)\n" 118 : : "r" (val), "r" (addr) ); 119#else 120 /* two writes may have side effects.. */ 121 gsc_writel(val >> 32, addr); 122 gsc_writel(val, addr+4); 123#endif 124} 125 126/* 127 * The standard PCI ioremap interfaces 128 */ 129 130extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); 131 132/* Most machines react poorly to I/O-space being cacheable... Instead let's 133 * define ioremap() in terms of ioremap_nocache(). 134 */ 135static inline void __iomem * ioremap(unsigned long offset, unsigned long size) 136{ 137 return __ioremap(offset, size, _PAGE_NO_CACHE); 138} 139#define ioremap_nocache(off, sz) ioremap((off), (sz)) 140 141extern void iounmap(const volatile void __iomem *addr); 142 143static inline unsigned char __raw_readb(const volatile void __iomem *addr) 144{ 145 return (*(volatile unsigned char __force *) (addr)); 146} 147static inline unsigned short __raw_readw(const volatile void __iomem *addr) 148{ 149 return *(volatile unsigned short __force *) addr; 150} 151static inline unsigned int __raw_readl(const volatile void __iomem *addr) 152{ 153 return *(volatile unsigned int __force *) addr; 154} 155static inline unsigned long long __raw_readq(const volatile void __iomem *addr) 156{ 157 return *(volatile unsigned long long __force *) addr; 158} 159 160static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) 161{ 162 *(volatile unsigned char __force *) addr = b; 163} 164static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) 165{ 166 *(volatile unsigned short __force *) addr = b; 167} 168static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) 169{ 170 *(volatile unsigned int __force *) addr = b; 171} 172static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) 173{ 174 *(volatile unsigned long long __force *) addr = b; 175} 176 177static inline unsigned char readb(const volatile void __iomem *addr) 178{ 179 return __raw_readb(addr); 180} 181static inline unsigned short readw(const volatile void __iomem *addr) 182{ 183 return le16_to_cpu(__raw_readw(addr)); 184} 185static inline unsigned int readl(const volatile void __iomem *addr) 186{ 187 return le32_to_cpu(__raw_readl(addr)); 188} 189static inline unsigned long long readq(const volatile void __iomem *addr) 190{ 191 return le64_to_cpu(__raw_readq(addr)); 192} 193 194static inline void writeb(unsigned char b, volatile void __iomem *addr) 195{ 196 __raw_writeb(b, addr); 197} 198static inline void writew(unsigned short w, volatile void __iomem *addr) 199{ 200 __raw_writew(cpu_to_le16(w), addr); 201} 202static inline void writel(unsigned int l, volatile void __iomem *addr) 203{ 204 __raw_writel(cpu_to_le32(l), addr); 205} 206static inline void writeq(unsigned long long q, volatile void __iomem *addr) 207{ 208 __raw_writeq(cpu_to_le64(q), addr); 209} 210 211#define readb readb 212#define readw readw 213#define readl readl 214#define readq readq 215#define writeb writeb 216#define writew writew 217#define writel writel 218#define writeq writeq 219 220#define readb_relaxed(addr) readb(addr) 221#define readw_relaxed(addr) readw(addr) 222#define readl_relaxed(addr) readl(addr) 223#define readq_relaxed(addr) readq(addr) 224 225#define mmiowb() do { } while (0) 226 227void memset_io(volatile void __iomem *addr, unsigned char val, int count); 228void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); 229void memcpy_toio(volatile void __iomem *dst, const void *src, int count); 230 231/* Port-space IO */ 232 233#define inb_p inb 234#define inw_p inw 235#define inl_p inl 236#define outb_p outb 237#define outw_p outw 238#define outl_p outl 239 240extern unsigned char eisa_in8(unsigned short port); 241extern unsigned short eisa_in16(unsigned short port); 242extern unsigned int eisa_in32(unsigned short port); 243extern void eisa_out8(unsigned char data, unsigned short port); 244extern void eisa_out16(unsigned short data, unsigned short port); 245extern void eisa_out32(unsigned int data, unsigned short port); 246 247#if defined(CONFIG_PCI) 248extern unsigned char inb(int addr); 249extern unsigned short inw(int addr); 250extern unsigned int inl(int addr); 251 252extern void outb(unsigned char b, int addr); 253extern void outw(unsigned short b, int addr); 254extern void outl(unsigned int b, int addr); 255#elif defined(CONFIG_EISA) 256#define inb eisa_in8 257#define inw eisa_in16 258#define inl eisa_in32 259#define outb eisa_out8 260#define outw eisa_out16 261#define outl eisa_out32 262#else 263static inline char inb(unsigned long addr) 264{ 265 BUG(); 266 return -1; 267} 268 269static inline short inw(unsigned long addr) 270{ 271 BUG(); 272 return -1; 273} 274 275static inline int inl(unsigned long addr) 276{ 277 BUG(); 278 return -1; 279} 280 281#define outb(x, y) BUG() 282#define outw(x, y) BUG() 283#define outl(x, y) BUG() 284#endif 285 286/* 287 * String versions of in/out ops: 288 */ 289extern void insb (unsigned long port, void *dst, unsigned long count); 290extern void insw (unsigned long port, void *dst, unsigned long count); 291extern void insl (unsigned long port, void *dst, unsigned long count); 292extern void outsb (unsigned long port, const void *src, unsigned long count); 293extern void outsw (unsigned long port, const void *src, unsigned long count); 294extern void outsl (unsigned long port, const void *src, unsigned long count); 295 296 297/* IO Port space is : BBiiii where BB is HBA number. */ 298#define IO_SPACE_LIMIT 0x00ffffff 299 300/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 301 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit 302 * mode (essentially just sign extending. This macro takes in a 32 303 * bit I/O address (still with the leading f) and outputs the correct 304 * value for either 32 or 64 bit mode */ 305#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) 306 307#include <asm-generic/iomap.h> 308 309/* 310 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 311 * access 312 */ 313#define xlate_dev_mem_ptr(p) __va(p) 314 315/* 316 * Convert a virtual cached pointer to an uncached pointer 317 */ 318#define xlate_dev_kmem_ptr(p) p 319 320#endif 321